981
FNCA52 TJSJ 150743
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
343 AM AST SAT AUG 15 2026
DISCUSSION
ELEVATED FIRE DANGER IS EXPECTED TODAY AS A VERY DRY AIRMASS
REMAINS ACROSS THE REGION AND STRONG EASTERLY WINDS CONTINUE
TODAY WITH WINDS BETWEEN 15 TO 20 MPH WITH GUSTS AROUND 35 MPH.
SIMILAR TO PREVIOUS DAYS, THESE CONDITIONS COMBINED WITH LITTLE
TO NO WETTING RAINFALL, ONGOING RAINFALL DEFICITS, STRESSED
VEGETATION, AND DRY FUELS WILL MAINTAIN CONDITIONS FAVORABLE FOR
RAPID FIRE SPREAD. THEREFORE, A FIRE DANGER STATEMENT WILL BE IN
EFFECT ACROSS ALL PUERTO RICO, CULEBRA, VIEQUES, AND THE U.S.
VIRGIN ISLANDS FROM 10 AM AST THIS MORNING THROUGH 5 PM AST THIS
AFTERNOON.
THE NORTHERN PERIPHERY OF AN APPROACHING TROPICAL WAVE (INVEST
92L) WILL APPROACH THE U.S. VIRGIN ISLANDS AND THE SOUTHERN COAST
OF PUERTO RICO LATER THIS AFTERNOON, SLIGHTLY INCREASING THE
MOISTURE CONTENT ACROSS THE AREA. NONETHELESS, THE DRY CONDITIONS
WILL PERSIST UNTIL THEN.
PRZ014-152015-
SOUTHEAST COASTAL PLAINS-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 20 40 30
TEMP (24H TREND) 92 (0) 75 (-3) 89
RH % (24H TREND) 50 (-5) 94 (+9) 59
WIND 20FT/EARLY(MPH) E 26 G34 NE 18 E 18
WIND 20FT/LATE(MPH) E 25 G33 E 13 E 18
MIXING HGT(FT-AGL/MSL)5630 5060
TRANSPORT WND (MPH) E 29 E 21
VENT RATE (KT-FT) 140750 91080
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-152015-
SOUTHERN HILLS-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 10 40 30
TEMP (24H TREND) 90 (+3) 71 (-4) 89
RH % (24H TREND) 55 (-5) 99 (+8) 62
WIND 20FT/EARLY(MPH) NE 20 NE 17 E 16
WIND 20FT/LATE(MPH) E 19 E 16 E 16
MIXING HGT(FT-AGL/MSL)6290 5820
TRANSPORT WND (MPH) E 28 E 20
VENT RATE (KT-FT) 150960 98940
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-152015-
NORTH COASTAL PLAINS-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 10 60 50
TEMP (24H TREND) 91 (+1) 75 (-3) 89
RH % (24H TREND) 61 (-5) 99 (+7) 65
WIND 20FT/EARLY(MPH) E 21 E 24 E 18
WIND 20FT/LATE(MPH) E 25 E 19 E 23
MIXING HGT(FT-AGL/MSL)5200 4780
TRANSPORT WND (MPH) E 30 E 21
VENT RATE (KT-FT) 135200 86040
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-152015-
NORTHERN HILLS-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 10 40 40
TEMP (24H TREND) 89 (0) 72 (-3) 89
RH % (24H TREND) 62 (-1) 100 (+3) 65
WIND 20FT/EARLY(MPH) E 21 E 21 E 17
WIND 20FT/LATE(MPH) NE 23 E 17 E 20
MIXING HGT(FT-AGL/MSL)5440 5980
TRANSPORT WND (MPH) E 29 E 17
VENT RATE (KT-FT) 136000 89700
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-152015-
WEST COAST-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 10 70
TEMP (24H TREND) 92 (0) 74 (-2) 89
RH % (24H TREND) 57 (-5) 96 (+5) 68
WIND 20FT/EARLY(MPH) E 21 NE 25 E 19
WIND 20FT/LATE(MPH) E 25 E 21 E 18
MIXING HGT(FT-AGL/MSL)5960 5020
TRANSPORT WND (MPH) E 24 E 15
VENT RATE (KT-FT) 125160 65260
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-152015-
EASTERN INTERIOR-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 30 60 50
TEMP (24H TREND) 90 (+2) 72 (-5) 89
RH % (24H TREND) 62 (-2) 100 (+7) 63
WIND 20FT/EARLY(MPH) E 19 E 18 E 17
WIND 20FT/LATE(MPH) E 19 E 17 E 16
MIXING HGT(FT-AGL/MSL)5700 5590
TRANSPORT WND (MPH) E 28 E 17
VENT RATE (KT-FT) 136800 83850
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-152015-
LUQUILLO MOUNTAIN RANGE-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY MCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 30 60 50
TEMP (24H TREND) 85 (+3) 70 (-4) 85
RH % (24H TREND) 68 (-7) 100 (+4) 68
WIND 20FT/EARLY(MPH) E 18 E 14 E 13
WIND 20FT/LATE(MPH) E 17 E 13 E 13
MIXING HGT(FT-AGL/MSL)5010 4320
TRANSPORT WND (MPH) E 28 E 18
VENT RATE (KT-FT) 120240 69120
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-152015-
CENTRAL MOUNTAIN RANGE-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 10 30 40
TEMP (24H TREND) 88 (+3) 70 (-3) 87
RH % (24H TREND) 62 (-1) 100 (+4) 67
WIND 20FT/EARLY(MPH) E 19 NE 20 E 13
WIND 20FT/LATE(MPH) NE 21 E 16 E 12
MIXING HGT(FT-AGL/MSL)6530 7450
TRANSPORT WND (MPH) E 25 E 14
VENT RATE (KT-FT) 143660 89400
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-152015-
CAYEY MOUNTAIN RANGE-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 30 60 40
TEMP (24H TREND) 86 (+2) 71 (-3) 85
RH % (24H TREND) 65 (-3) 100 (+4) 69
WIND 20FT/EARLY(MPH) NE 18 NE 14 E 13
WIND 20FT/LATE(MPH) E 18 E 12 E 13
MIXING HGT(FT-AGL/MSL)5310 4720
TRANSPORT WND (MPH) E 29 E 18
VENT RATE (KT-FT) 132750 75520
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-152015-
VIEQUES-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 30 60 40
TEMP (24H TREND) 91 (+2) 78 (-3) 89
RH % (24H TREND) 58 (-5) 90 (+8) 59
WIND 20FT/EARLY(MPH) E 23 E 20 E 20
WIND 20FT/LATE(MPH) E 23 E 20 E 18
MIXING HGT(FT-AGL/MSL)4390 3570
TRANSPORT WND (MPH) E 32 E 22
VENT RATE (KT-FT) 122920 67830
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-152015-
CULEBRA-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 30 60 30
TEMP (24H TREND) 91 (+2) 78 (-3) 89
RH % (24H TREND) 61 (-9) 93 (+8) 63
WIND 20FT/EARLY(MPH) E 23 E 20 E 20
WIND 20FT/LATE(MPH) E 21 E 20 E 18
MIXING HGT(FT-AGL/MSL)4560 3530
TRANSPORT WND (MPH) E 33 E 22
VENT RATE (KT-FT) 132240 67070
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-152015-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 20
TEMP (24H TREND) 92 (0) 75 (-2) 89
RH % (24H TREND) 50 (-7) 91 (+6) 60
WIND 20FT/EARLY(MPH) E 24 G31 E 23 E 23
WIND 20FT/LATE(MPH) E 26 G34 E 20 E 25 G33
MIXING HGT(FT-AGL/MSL)6330 5390
TRANSPORT WND (MPH) E 25 E 23
VENT RATE (KT-FT) 139260 107800
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-152015-
SAINT THOMAS AND SAINT JOHN-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 30 60 30
TEMP (24H TREND) 89 (+2) 77 (-4) 88
RH % (24H TREND) 61 (-9) 92 (+7) 60
WIND 20FT/EARLY(MPH) E 23 E 21 E 20
WIND 20FT/LATE(MPH) E 23 E 20 E 18
MIXING HGT(FT-AGL/MSL)3450 3530
TRANSPORT WND (MPH) E 33 E 23
VENT RATE (KT-FT) 100050 70600
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-152015-
ST CROIX-
343 AM AST SAT AUG 15 2026
TODAY TONIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS TSTMS SHOWERS
CHANCE PRECIP (%) 40 60 50
TEMP (24H TREND) 90 (+2) 78 (-3) 89
RH % (24H TREND) 63 (-7) 96 (+8) 63
WIND 20FT/EARLY(MPH) E 24 E 21 E 20
WIND 20FT/LATE(MPH) E 24 E 20 E 18
MIXING HGT(FT-AGL/MSL)4390 4530
TRANSPORT WND (MPH) E 33 E 23
VENT RATE (KT-FT) 127310 90600
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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